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Subjectgit-shortlog script

Attached is the 'git-shortlog' script I whipped up, to mimic the
shortlog script that was used back in the BitKeeper days.

shortlog reads a changelog in the 'git-whatchanged' format, such as

git-whatchanged | git-shortlog
or
git-shortlog changes.txt

and outputs the changes sorted by author:

author1:
cset 1-line desc
cset 1-line desc
...
author2:
cset 1-line desc
...
...

Since git distinguishes 'author' from 'committer', I ran

git-whatchanged | git-shortlog > changes.txt

to look at the kernel authors throughout the entire history [of which is
in git].

It's fun to browse, since this is the first time we've been able to get
a better picture who is actually writing the patches, versus committing
them. See changes.txt.bz2, attached.

Jeff



#!/usr/bin/perl -w

use strict;

my ($author, $desc, %map);
my $pstate = 1;

while (<>) {
# get author
if ($pstate == 1) {
next unless /^Author: (.*)$/;
$author = $1;
$pstate++;
}

# skip to blank line
elsif ($pstate == 2) {
next unless /^\s*$/;
$pstate++;
}

# skip to non-blank line
elsif ($pstate == 3) {
next if /^\s*$/;
chomp;
$desc = $_;

&shortlog_entry($author, $desc);

$pstate = 1;
}

else {
die "invalid parse state $pstate";
}
}

&shortlog_output;
exit(0);


sub shortlog_entry($$) {
my ($tmp_author, $tmp_desc) = @_;

$tmp_desc =~ s#/pub/scm/linux/kernel/git/#/.../#g;
$tmp_desc =~ s#\[PATCH\] ##g;
$tmp_desc =~ s#^\s+##g;

if (exists $map{$tmp_author}) {
# grab ref
my $obj = $map{$tmp_author};

# add desc to array
push(@$obj, $tmp_desc);
} else {
# create new array, containing 1 item
my @arr = ($tmp_desc);

# store ref to array
$map{$tmp_author} = \@arr;
}
}

sub shortlog_output {
my ($obj);

foreach $author (sort keys %map) {
print "$author:\n";

$obj = $map{$author};
foreach $desc (@$obj) {
print " $desc\n";
}

print "\n";
}
}

[unhandled content-type:application/x-bzip2]
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